649049959 has 2 divisors, whose sum is σ = 649049960. Its totient is φ = 649049958.

The previous prime is 649049941. The next prime is 649049963. The reversal of 649049959 is 959940946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649049959 - 2⁵ = 649049927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649049969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324524979 + 324524980.

It is an arithmetic number, because the mean of its divisors is an integer number (324524980).

Almost surely, 2^649049959 is an apocalyptic number.

649049959 is a deficient number, since it is larger than the sum of its proper divisors (1).

649049959 is an equidigital number, since it uses as much as digits as its factorization.

649049959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3149280, while the sum is 55.

The square root of 649049959 is about 25476.4589179894. The cubic root of 649049959 is about 865.8168674232.

The spelling of 649049959 in words is "six hundred forty-nine million, forty-nine thousand, nine hundred fifty-nine".